Weyenot
When you build a compost pile it's a good idea to use materials at the base which will allow for aeration to keep things moving correctly in the working material. One plant that you can use is sunflower stalks that you cut to the lengths you need for creating a web with stalks running vertically and horizontally.
Stinging Nettles create a thick stalk like sunflowers and you can use them as well. When you harvest the leaves to create a liquid you'll be way ahead of the game if you remove them from the branches because in the 3 or 4 week soaking in water not much will happen with the branches because of the lignin they contain like any plant stalk or branch - even leaves from trees. So by removing the leaves you'll have a better liquid material to work with. But if you leave them on then you can use the wet branches as you build your pile so you're not wasting anything.
When you harvest the entire plant at the end of the season you want to separate the nettle's root mass. It contains a lot of different compounds, enzymes, etc. that are different than those found in the leaves and even stalk or branches. You can find information on stinging nettle roots and their value at Horizon Herbs and Mountain Rose Herbs which sell botanical extracts from a wide range of plants - powders, oils, et al.
Back to the lignin content - comfrey leaves and even the short stalks the grow out from the crown will contain very little lignin so that when you chop it up and cover it with water by the end of that process you will have very little material which did not decompose completely so you get more usable biomass with comfrey than stinging nettles for this process anyway.
Both plants are very good compost activators (Nitrogen) so keep that in mind as you plan scheduling when to start a new pile.
Heat is a function of biology as a result of microbes breaking down green material (Nitrogen) but has little, if anything, to do with the actual composting of the bulk of the material in a compost pile - brown material (Carbon). About the most that ramping up the temperatures accomplishes is to kill pathogens and seeds from the plant materials you've used. And the seed deal isn't 100% at all.
CC
When you build a compost pile it's a good idea to use materials at the base which will allow for aeration to keep things moving correctly in the working material. One plant that you can use is sunflower stalks that you cut to the lengths you need for creating a web with stalks running vertically and horizontally.
Stinging Nettles create a thick stalk like sunflowers and you can use them as well. When you harvest the leaves to create a liquid you'll be way ahead of the game if you remove them from the branches because in the 3 or 4 week soaking in water not much will happen with the branches because of the lignin they contain like any plant stalk or branch - even leaves from trees. So by removing the leaves you'll have a better liquid material to work with. But if you leave them on then you can use the wet branches as you build your pile so you're not wasting anything.
When you harvest the entire plant at the end of the season you want to separate the nettle's root mass. It contains a lot of different compounds, enzymes, etc. that are different than those found in the leaves and even stalk or branches. You can find information on stinging nettle roots and their value at Horizon Herbs and Mountain Rose Herbs which sell botanical extracts from a wide range of plants - powders, oils, et al.
Back to the lignin content - comfrey leaves and even the short stalks the grow out from the crown will contain very little lignin so that when you chop it up and cover it with water by the end of that process you will have very little material which did not decompose completely so you get more usable biomass with comfrey than stinging nettles for this process anyway.
Both plants are very good compost activators (Nitrogen) so keep that in mind as you plan scheduling when to start a new pile.
Heat is a function of biology as a result of microbes breaking down green material (Nitrogen) but has little, if anything, to do with the actual composting of the bulk of the material in a compost pile - brown material (Carbon). About the most that ramping up the temperatures accomplishes is to kill pathogens and seeds from the plant materials you've used. And the seed deal isn't 100% at all.
CC